zabbix通过JMX监控Tomcat及一些报错

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软件包下载地址：
Wget http://archive.apache.org/dist/t ... omcat-7.0.11.tar.gz

#安装jdk:
Mkdir /usr/lib/jvm
Tar xf jdk-7u45-linux-x64.gz -C /usr/lib/jvm

#在profile追加以下内容
Vim /etc/profile
JAVA_HOME="/usr/lib/jvm/jdk1.7.0_45"
CLASS_PATH="$JAVA_HOME/lib:$JAVA_HOME/jar/lib"
PATH=".:$PATH:$JAVA_HOME/bin"
#CATALINA_HOME="/usr/local/apache-tomcat-7.0.11"
export JAVA_HOME CATALINA_HOME

#检查是否安装成功
Source /etc/profile
java -version

#解压tomcat
tar xf apache-tomcat-7.0.11.tar.gz -C /usr/local/
Cd /usr/local/apache-tomcat-7.0.11/bin
./start.sh


#Tomcat 配置jmx
JAVA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"


#下载cmdline-jmxclient-0.10.3.jar

/usr/local/apache-tomcat-7.0.11/lib/cmdline-jmxclient-0.10.3.jar

#本地测试
java -jar cmdline-jmxclient-0.10.3.jar - 10.10.31.20:10053 java.lang:type=Memory NonHeapMemoryUsage


报错信息：

java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectI

java.rmi.ConnectIOException: Exception creating connection to: 10.10.31.20; nested exception is:
java.net.NoRouteToHostExcepti

#编辑server.xml
/usr/local/apache-tomcat-7.0.11/conf/server.xml
#添加如下
<Listener className="org.apache.catalina.mbeans.JmxRemoteLifecycleListener"  
         rmiRegistryPortPlatform="10053" rmiServerPortPlatform="10054" />

创建tomcat/bin/setenv.sh  
CATALINA_OPTS="${CATALINA_OPTS} -Djava.rmi.server.hostname=10.10.31.20"  
CATALINA_OPTS="${CATALINA_OPTS} -Djavax.management.builder.initial="  
CATALINA_OPTS="${CATALINA_OPTS} -Dcom.sun.management.jmxremote=true"  
CATALINA_OPTS="${CATALINA_OPTS} -Dcom.sun.management.jmxremote.ssl=false"  
CATALINA_OPTS="${CATALINA_OPTS} -Dcom.sun.management.jmxremote.authenticate=false"

Iptables开放端口
-A INPUT -p tcp -m state --state NEW -m tcp --dport 10053 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 10054 -j ACCEPT

java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.ServiceUnavailableException [Root exception is java.rmi.Con